fix

packages/babel-core/package.json

@@ -41,11 +41,9 @@
     "./lib/config/files/index.js": "./lib/config/files/index-browser.js",
     "./lib/config/resolve-targets.js": "./lib/config/resolve-targets-browser.js",
     "./lib/transform-file.js": "./lib/transform-file-browser.js",
-    "./lib/transformation/util/clone-deep.js": "./lib/transformation/util/clone-deep-browser.js",
     "./src/config/files/index.ts": "./src/config/files/index-browser.ts",
     "./src/config/resolve-targets.ts": "./src/config/resolve-targets-browser.ts",
-    "./src/transform-file.ts": "./src/transform-file-browser.ts",
-    "./src/transformation/util/clone-deep.ts": "./src/transformation/util/clone-deep-browser.ts"
+    "./src/transform-file.ts": "./src/transform-file-browser.ts"
   },
   "dependencies": {
     "@ampproject/remapping": "^2.1.0",
@@ -58,7 +56,6 @@
     "@babel/template": "workspace:^",
     "@babel/traverse": "workspace:^",
     "@babel/types": "workspace:^",
-    "clone-deep": "^4.0.1",
     "convert-source-map": "^1.7.0",
     "debug": "^4.1.0",
     "gensync": "^1.0.0-beta.2",

packages/babel-core/src/transformation/util/clone-deep.ts

@@ -1,16 +1,32 @@
-import v8 from "v8";
-import cloneDeep from "clone-deep";
-import semver from "semver";
+//https://github.com/babel/babel/pull/14583#discussion_r882828856
+function deepClone(value, cache) {
+  if (value !== null) {
+    if (cache.has(value)) return cache.get(value);
+    let cloned;
+    if (Array.isArray(value)) {
+      cloned = new Array(value.length);
+      for (let i = 0; i < value.length; i++) {
+        cloned[i] =
+          typeof value[i] !== "object" ? value[i] : deepClone(value[i], cache);
+      }
+    } else {
+      cloned = {};
+      const keys = Object.keys(value);
+      for (let i = 0; i < keys.length; i++) {
+        const key = keys[i];
+        cloned[key] =
+          typeof value[key] !== "object"
+            ? value[key]
+            : deepClone(value[key], cache);
+      }
+    }
+    cache.set(value, cloned);
+    return cloned;
+  }
+  return value;
+}
 
 export default function (value) {
-  // There was a memory leak prior to node 18.2.0
-  // https://github.com/nodejs/node/issues/40828
-  if (
-    v8.deserialize &&
-    v8.serialize &&
-    semver.satisfies(process.versions.node, ">=18.2.0")
-  ) {
-    return v8.deserialize(v8.serialize(value));
-  }
-  return cloneDeep(value);
+  if (typeof value !== "object") return value;
+  return deepClone(value, new Map());
 }

packages/babel-core/test/api.js

@@ -201,6 +201,44 @@ describe("api", function () {
     expect(options).toEqual({ babelrc: false });
   });
 
+  it("transformFromAst should generate same code with different cloneInputAst", function () {
+    const program = `//test1
+    /*test2*/var/*test3*/ a = 1/*test4*/;//test5
+    //test6
+    var b;
+    `;
+    const node = parse(program);
+    const { code } = transformFromAst(node, program, {
+      plugins: [
+        function () {
+          return {
+            visitor: {
+              Identifier: function (path) {
+                path.node.name = "replaced";
+              },
+            },
+          };
+        },
+      ],
+    });
+    const { code: code2 } = transformFromAst(node, program, {
+      cloneInputAst: false,
+      plugins: [
+        function () {
+          return {
+            visitor: {
+              Identifier: function (path) {
+                path.node.name = "replaced";
+              },
+            },
+          };
+        },
+      ],
+    });
+
+    expect(code).toBe(code2);
+  });
+
   it("transformFromAst should not mutate the AST", function () {
     const program = "const identifier = 1";
     const node = parse(program);

yarn.lock

@@ -339,7 +339,6 @@ __metadata:
     "@types/debug": ^4.1.0
     "@types/resolve": ^1.3.2
     "@types/semver": ^5.4.0
-    clone-deep: ^4.0.1
     convert-source-map: ^1.7.0
     debug: ^4.1.0
     gensync: ^1.0.0-beta.2